Imaging flaws in thin metal plates using a magneto-optic deviceAn account is given of the capabilities of the magnetooptic/eddy-current imager (MEI) apparatus in the case of aging aircraft structure-type flaws in 2024-T3 Al alloy plates. Attention is given to images of cyclically grown fatigue cracks from rivetted joints in fabricated lap-joint structures, electrical discharge machining notches, and corrosion spots. Although conventional eddy-current methods could have been used, the speed and ease of MEI's use in these tests is unmatched by such means. Results are displayed in real time as a test piece is scanned, furnishing easily interpreted flaw images.
Wincheski, B. (NASA Langley Research Center Hampton, VA, United States)
Prabhu, D. R. (NASA Langley Research Center; AS&M, Inc. Hampton, VA, United States)
Namkung, M. (NASA Langley Research Center Hampton, VA, United States)
Birt, E. A. (NASA Langley Research Center; AS&M, Inc. Hampton, VA, United States)
August 15, 2013
January 1, 1992
Publication: In: Review of progress in quantitative nondestructive evaluation. Vol. 11A; Proceedings of the 18th Annual Review, Brunswick, ME, July 28-Aug. 2, 1991 (A93-18576 05-38)